JPS63251504A - Polyhedral float structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a polygonal floating structure that floats on the water surface and is used as a floating pier, floating breakwater, or the like.

(Prior technology) Conventional floating jetties and floating breakwaters are hollow reinforced concrete floating bodies that are integrally formed in the shape of a rectangular box at factories, docks, etc., and transported to sites such as the sea or lake, where they are moored and connected to anchors. One end of the cheno is fixed and moored to the four corners.

(Problems to be Solved by the Invention) Conventional floating bodies constituting floating piers and floating breakwaters as described above are simply floating bodies made of steel cylinder concrete, and therefore cracks occur due to impact or rocking caused by waves. However, there was a problem of poor durability.

Therefore, it is conceivable to incorporate PC (prestressed concrete and below) IJAlm into the floating body to create a prestressed concrete structure, but manufacturing it is labor intensive and requires a lot of economically expensive materials. Therefore, there is a problem of high cost as a whole, and if it is manufactured as an integral structure in a factory or dock etc.
There was also iI3@.

Furthermore, since the floating body is moored at its outer periphery, when it is rocked by waves, a large local load is placed on the mooring point, making it difficult to moor it! There was la.

In view of these conventional problems, the present invention aims to provide a polygonal floating structure that can prevent cracks, is highly durable, has a high wave-proofing effect, and is easy to manufacture and moor even when large. This is the purpose.

(Means for Solving the Problems) The gist of the present invention for solving the above-mentioned problems is to connect hollow concrete units to form a regular polygonal ring shape having a diagonal passing through the center. forming a floating body body, connecting each diagonal corner of the floating body body with PCI material, and applying tension to the floating body body in a direction in which each diagonal corner approaches each other by tensioning the PC steel material. It was characterized by

(Operation) According to the above configuration, the PCs connected to each diagonal
By tensioning the steel material and applying a tension force to the floating body body in a direction in which each diagonal angle approaches each other, it is possible to join at sea,
A component of the tensile force in the center direction acting along the PCA material acts in the length direction of the concrete units connected in a regular polygonal ring shape, and prestress is applied to each concrete unit. .

Moreover, since each PC steel material intersects at the center of the ring-shaped floating body body, it can be moored at the intersection part.

(Example) An embodiment of the present invention will be described below based on the drawings.

In the figure, A is a polygonal floating structure according to the present invention, and A is a floating body 1 formed into a regular hexagon by connecting hollow concrete units 2, each diagonal θ of the floating body 1,
θ1. θ2. It is made of PC steel members 3 that are connected and tensioned between θ2 and θ3.03, respectively, and an appropriate number of these are connected and used as a floating structure such as a floating pier or a floating breakwater on the sea or lake.

The floating body 1 is formed into a regular hexagonal ring shape with a diagonal line passing through the center, with both short side surfaces of the concrete unit 2 connected to each other.

Then, each diagonal angle θl, θ1° θ2 . θ2
and θ3. θ3 are respectively connected by PC steel materials 3, and the PC steel materials 3 are tensed to apply a tension force in a direction in which the diagonals come closer to each other.

When the PC steel material 3 is tensed, a force P in the direction of mutual attraction acts between each diagonal, and component forces Pr and P2 act on each concrete unit 2, respectively, and prestress is applied to each concrete unit 2. It is something that will be done.

The concrete unit 2 is an elongated hollow body with a square cross section and a space m inside where vertical reinforcements 4a and horizontal reinforcements 4b are arranged at appropriate intervals. It has buoyancy.

Further, the concrete unit 2 is formed into a planar trapezoid shape, and a tapered joint surface 5 is formed on both side surfaces 2a, 2a on the short side.

The joint surface 5 is for connecting other concrete units 2, and mounting holes 6 are drilled on both sides of the upper and lower parts to which connecting bolts 6a are attached, and a joint frame 7 is formed upright on the periphery of the joint surface 5. has been done.

Further, the angle of inclination of the joint surface 5 is determined according to the number of angles of the regular polygon formed; for example, as the number of angles increases, the angle becomes obtuse, and as the number of angles decreases, the angle becomes acute.

A semicircular insertion hole 8- into which the PCM material 3 is inserted is formed in the center of both side frames 7a of the joint frame 7, and the circular insertion hole 8 is formed with the joint surfaces 5 of the concrete unit 2 aligned. It is something that is formed.

When the PCM material 3 is inserted into the insertion hole 8, the PC steel material 3
intersect at the center of the polygon, so the PC steel material 3 is formed at a position shifted either up or down by the diameter valve.

The paw materials 3 are connected to each diagonal corner of the floating body 1 formed in a hexagonal shape via fixing devices 9, and each PC steel material 3 is pulled using appropriate jacks and screwed onto both ends. Each diagonal θ is tightened by tightening the nuts 3a
l, θ1. θ2. θ2, and θ3. A state in which tension is applied to θ3 as it approaches the center is maintained.

The fixing device 9 is attached to both ends of the PCI material 3 to stabilize the connection and fastening to the diagonal θ, and has an abutment portion 9a corresponding to the outer corner of the floating body body 1 on the inside thereof.
is formed.

Further, the RPC steel materials 3 intersect each other at the center of the polygon, and in the case of this embodiment, three RPC steel materials 3 are connected in a vertically overlapping state.

This also applies when the number of PC steel materials 3 increases or decreases due to an increase or decrease in the number of corners.

Next, the assembly and formation of the polygonal floating structure A will be explained.

The polygonal floating structure A floats concrete units 2 manufactured in a factory or the like on the ocean, and then combines them to form an arbitrary regular polygonal structure.

Therefore, compared to conventional integrally formed floating bodies, it is easier to manufacture and transport, so it can be easily transported and assembled to any location.

First, the joint surface 5 of the concrete unit 2
Connecting bolts 6a are attached to each mounting hole 6 on one of both joint surfaces 5.
A regular hexagonal ring-shaped floating body 1 with a diagonal passing through the center is assembled and connected.

In this case, packings 10 are provided below the bolt head 6al and below the nut 6a2 of the connecting bolt 6a, respectively, to prevent water from flowing into the hollow portion.

Further, the connection of these connecting bolts 6a is performed from inside the hollow part l by a worker entering the hollow part l through a working hole (not shown) provided in the upper wall or side wall of the concrete unit 2.

Next, PC steel members 3 are connected to each diagonal corner of the floating body body 1 formed in a hexagonal ring shape, and nuts 3 at both ends are connected.
Prestress is applied to each concrete unit 2 by tightening the prestressing steel members 3 and tensioning the prestressing steel members 3.

Then, a large number of polygonal floating structures A formed in the shape of a hexagonal ring as described above are floated on the sea or on a lake, and as shown in Fig. Form a floating pier B or floating breakwater of the same size.

Therefore, for example, by connecting the ring-shaped floating bodies A to form a larger ring-shaped floating breakwater, the wave-dissipating effect can be enhanced.

In this case, one end of the mooring chain 12 connected to the anchor 11 is a PC that intersects at the center of the polygonal floating 41T1 object A, respectively.
It can be connected to the intersection O of the tjA material 3.

Therefore, since the mooring chain 12 is connected to the center of the swinging of the polygonal floating structure A, that is, the part where the swinging is the least, excessive force is not applied to the mooring chain 12, thereby preventing the risk of it being cut off. Can be done.

In addition, although the polygonal floating structure A in the embodiment of the present invention is hexagonal, it may be formed into any regular polygon such as a quadrangle, hexagon, or decagon, and any side surface of the floating body body may be formed. It is also possible to connect them to form any type of floating pier and floating breakwater.

(Effects of the Invention) The present invention has the following effects by having the above configuration.

■ Hollow concrete units are connected to form a regular polygonal floating structure with a diagonal passing through the center, and PC steel members are connected to the diagonals of the polygonal floating structure and tensioned. Since prestress is applied to each concrete unit, cracking of the concrete units constituting the polygonal floating structure can be prevented and the durability of the polygonal floating structure can be increased.

■ By connecting hollow concrete units to form a polygonal floating structure, it is possible to form a regular polygonal floating structure with any number of angles and size on the sea or lake. , these can be connected to form any shape, size and length, such as curved or U-shaped.
Alternatively, a floating breakwater can be easily formed, and its wave-breaking effect can also be enhanced.

■ By intersecting and connecting the PCM materials at the center of the regular polygon, the mooring chain can be moored at the intersection where the oscillation is least, thereby preventing large local loads from being applied to the mooring location. can do.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the polygonal floating structure of the present invention, Fig. 2 is a front view thereof, Fig. 3 is an enlarged sectional view of the main part, and Fig. 4 is a floating breakwater created by connecting the polygonal floating structures. 5 is a cross-sectional view of the concrete unit, FIG. 6 is an enlarged sectional view taken along line 1-1 in FIG. 5, and FIG. 7 is a perspective view of the concrete unit. A: Polygonal floating structure, 1: Floating body body, 2: Concrete unit, 3: PC steel patent Applicant: Hiro Inagaki, former attorney: Sasa Sasa
Wood Isao Figure 1 Figure 8 Figure 6

Claims (1)

[Claims] Hollow concrete units are connected to form a floating body in the shape of a regular polygon ring with a diagonal passing through the center, each diagonal of the floating body is connected with a prestressed steel material, and the prestressed steel material is tensioned. A polygonal floating structure characterized in that a tension force is applied to the floating body body in a direction in which each diagonal corner approaches each other.